Clarify ConfigFile class methods that return error

related to godotengine#80936

doc/classes/ConfigFile.xml

@@ -163,7 +163,7 @@
 			<param index="0" name="path" type="String" />
 			<description>
 				Loads the config file specified as a parameter. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="load_encrypted">
@@ -172,7 +172,7 @@
 			<param index="1" name="key" type="PackedByteArray" />
 			<description>
 				Loads the encrypted config file specified as a parameter, using the provided [param key] to decrypt it. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="load_encrypted_pass">
@@ -181,23 +181,23 @@
 			<param index="1" name="password" type="String" />
 			<description>
 				Loads the encrypted config file specified as a parameter, using the provided [param password] to decrypt it. The file's contents are parsed and loaded in the [ConfigFile] object which the method was called on.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="parse">
 			<return type="int" enum="Error" />
 			<param index="0" name="data" type="String" />
 			<description>
 				Parses the passed string as the contents of a config file. The string is parsed and loaded in the ConfigFile object which the method was called on.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="save">
 			<return type="int" enum="Error" />
 			<param index="0" name="path" type="String" />
 			<description>
 				Saves the contents of the [ConfigFile] object to the file specified as a parameter. The output file uses an INI-style structure.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="save_encrypted">
@@ -206,7 +206,7 @@
 			<param index="1" name="key" type="PackedByteArray" />
 			<description>
 				Saves the contents of the [ConfigFile] object to the AES-256 encrypted file specified as a parameter, using the provided [param key] to encrypt it. The output file uses an INI-style structure.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="save_encrypted_pass">
@@ -215,7 +215,7 @@
 			<param index="1" name="password" type="String" />
 			<description>
 				Saves the contents of the [ConfigFile] object to the AES-256 encrypted file specified as a parameter, using the provided [param password] to encrypt it. The output file uses an INI-style structure.
-				Returns one of the [enum Error] code constants ([constant OK] on success).
+				Returns [constant OK] on success, or one of the other [enum Error] values if the operation failed.
 			</description>
 		</method>
 		<method name="set_value">